CN215702966U - Variable-diameter drill bit - Google Patents
Variable-diameter drill bit Download PDFInfo
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- CN215702966U CN215702966U CN202121752368.5U CN202121752368U CN215702966U CN 215702966 U CN215702966 U CN 215702966U CN 202121752368 U CN202121752368 U CN 202121752368U CN 215702966 U CN215702966 U CN 215702966U
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Abstract
The utility model provides a variable-diameter drill bit which is matched with a drill barrel and comprises a drill bit body, wherein the drill bit body comprises at least one adjusting rod, the adjusting rod comprises two movable rods which are hinged, a plurality of drilling teeth are arranged on each movable rod, the two movable rods are arranged at an included angle through an adjusting mechanism, and when the two movable rods are located at the maximum included angle, the two movable rods are respectively supported by two adjusting claws arranged on the drill bit body. The adjustable drill bit is provided with the corresponding adjusting claws, the adjusting claws can support the two movable rods when the included angle of the two movable rods is 180 degrees or slightly smaller than 180 degrees, so that the influence of drilling operation on the two movable rods is small when the two movable rods drill under the state, the hinged point of the two movable rods is not easily damaged in the drilling process due to insufficient connecting stress between the two movable rods, meanwhile, the two movable rods cannot be bent or broken when drilling under the state, and the service life of the variable-diameter drill bit is prolonged.
Description
Technical Field
The utility model relates to the technical field of drill bits, in particular to a variable-diameter drill bit.
Background
The drilling operation is the conventional operation of road protection setting installation, a drill bit is arranged on a drill cylinder, and the drill cylinder rotates through a driving mechanism to drive the drill bit to rotate so as to carry out the drilling operation.
The drill bit in the prior art is usually a fixed structure, and the aperture size of the maximum drilling hole is fixed; in the cement pouring process, in order to improve the strength of the cement column, the cement column is required to be a variable-diameter cement column, preferably, the cement column is composed of two sections of cement columns of which the diameters of the lower ends are larger than those of the upper ends, and in order to achieve the purpose, drill bits of different sizes need to be replaced when the drilling operation is carried out, so that the drilling operation is very inconvenient.
Therefore, but the drill bit of the reducing that corresponds has been designed among the prior art, and the drilling tooth of this drill bit sets up on a plurality of regulation poles, and every regulation pole comprises two movable rods that articulated each other set up, sets up the adjusting part who corresponds, changes the contained angle of two movable rods, and then changes the drilling size of drill bit, reaches the purpose of drill bit reducing, and need not change the drill bit in different drilling apertures and bore a section of thick bamboo for it is more convenient to drill out the operation in reducing hole.
Because among the prior art when using the reducing drill bit, the contained angle between two movable rods changes between being less than or equal to 180 usually, when the contained angle of two movable rods is less than 180, the interact power has between two movable rods, when carrying out drilling operation, two movable rods are not fragile, however, the contained angle of two movable rods is 180 or slightly less than when 180, because the drill bit that prior art set up does not support the regulating lever, and the pin joint of two movable rods has certain activity space, when carrying out drilling operation, easy to operate adjusts the pole damage.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a drill bit with variable diameters, which solves the problem that when the included angle between two movable rods is 180 degrees or slightly smaller than 180 degrees in the prior art, the two movable rods are easy to damage during drilling operation.
In order to achieve the purpose, the utility model adopts the following technical scheme: a variable-diameter drill bit is matched with a drill barrel for installation, and comprises a drill bit body, wherein the drill bit body comprises at least one adjusting rod, the adjusting rod is arranged in an installation through groove formed in the drill barrel and comprises two movable rods which are hinged, each movable rod is provided with a plurality of drilling teeth, the two movable rods are arranged at an included angle through an adjusting mechanism,
when the two movable rods are positioned at the maximum included angle, the two movable rods are respectively supported by two adjusting claws arranged on the drill bit body.
Further, the adjusting mechanism comprises a rotating rod which is sleeved in the drill cylinder and is rotationally connected with the drill cylinder,
the rotating rod is respectively provided with a left-handed thread section and a right-handed thread section along the length direction thereof, the left-handed thread section and the right-handed thread section are respectively provided with an upper adjusting nut and a lower adjusting nut which are in threaded connection, the upper adjusting nut is hinged with one of the movable rods, the lower adjusting nut is hinged with the other movable rod,
the two adjusting claws are positioned between the left-handed thread section and the right-handed thread section and are fixed with the rotating rod,
when the adjusting device is used, the rotating rod is rotated, the upper adjusting nut and the lower adjusting nut move relatively or move back to back, the included angle of the two movable rods is driven to change, and when the two movable rods are located at the maximum included angle, the two movable rods are respectively in contact with the two adjusting claws.
Further, still be equipped with the locking Assembly that the cooperation was used between dwang and the brill section of thick bamboo, locking Assembly includes two external screw thread covers and the internal thread cover of locking that the cooperation was used, and two external screw thread covers set up relatively and fixed with a brill section of thick bamboo, dwang respectively, internal thread cover of locking and external screw thread cover threaded connection are used for locking two external screw thread covers.
Furthermore, the adjusting rods are arranged in a ring shape, each adjusting rod is respectively matched and installed with the installation through groove arranged on the drilling barrel, the two movable rods of each adjusting rod are respectively a first movable rod and a second movable rod,
the first movable rods are hinged with the upper adjusting nuts, the second movable rods are hinged with the lower adjusting threads,
the first movable rod/second movable rods are used with the same adjusting claw.
Furthermore, the regulating claw comprises a supporting plate fixedly connected with the rotating rod and a clamping groove arranged on the supporting plate and used for clamping the movable rod.
Compared with the prior art, the utility model has the following beneficial effects: the adjustable drill bit is provided with the corresponding adjusting claws, the adjusting claws can support the two movable rods when the included angle of the two movable rods is 180 degrees or slightly smaller than 180 degrees, so that the two movable rods are ensured to have small influence on the two movable rods when drilling is carried out along with the rotation of the drill cylinder under the state, the hinged point of the two movable rods is not easy to damage in the drilling process due to insufficient connecting stress between the two movable rods, meanwhile, the two movable rods cannot be bent or broken when drilling is carried out under the state, and the service life of the variable-diameter drill bit is prolonged.
Drawings
FIG. 1 is a schematic structural view of a first movable bar and a second movable bar at a maximum included angle according to the present invention;
fig. 2 is a schematic structural view of fig. 1 after an included angle between the first movable bar and the second movable bar is changed;
fig. 3 is a schematic structural view of an adjusting claw of the present invention.
In the figure: 1. an external thread sleeve; 2. locking the internal thread sleeve; 3. a fixing plate; 4. rotating the rod; 5. a bearing; 6. an upper adjusting nut; 7. adjusting a rod; 8. a lower adjusting nut; 9. mounting a column; 10. an adjusting claw; 71. a first movable bar; 72. a second movable bar; 101. a card slot; 102. a support plate; 11. drilling a barrel; 12. and installing a through groove.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the embodiments.
As shown in fig. 1 and 2, an embodiment of the present invention provides a variable-diameter drill bit, which is installed in cooperation with a drill barrel 11, and the drill bit includes a drill bit body, so that the drill bit body has a possibility of diameter variation, theoretically, it only needs to ensure that the drill bit body includes at least one adjusting rod 7, the corresponding adjusting rod 7 is disposed in an installation through slot 12 formed in a side wall of the drill barrel 11, and the adjusting rod 7 is limited, and meanwhile, the drill barrel 11 can be conveniently driven to rotate when rotating, and the adjusting rod 7 can be driven to rotate; the adjusting rod 7 comprises two movable rods which are hinged, and the diameter-changing arrangement of the whole drill bit body can be realized by changing the included angle of the two movable rods; however, in order to ensure the stability of the whole drill bit body and be more applicable to a harder soil layer during drilling operation, the adjusting rod 7 provided by the utility model comprises a plurality of adjusting rods which are annularly arranged, and each adjusting rod 7 is matched and installed with the installation through groove formed in the drill barrel 11; for the sake of distinction, the two movable bars provided on each adjustment lever 7 are divided into a first movable bar 71 and a second movable bar 72, and a plurality of drilling teeth are provided on both the first movable bar 71 and the second movable bar 72.
As shown in fig. 1 and 2, in order to enable the included angles between the first movable rods 71 and the second movable rods 72 of different adjusting rods 7 to simultaneously change the same angle, the present invention is provided with an adjusting mechanism, the adjusting mechanism comprises a rotating rod 4 which is sleeved in the drill barrel 11 and is rotatably connected with the drill barrel 11 through a bearing 5, a left-handed thread section and a right-handed thread section are respectively arranged on the rotating rod 4 along the length direction thereof, the left-handed thread section and the right-handed thread section are respectively provided with an upper adjusting nut 6 and a lower adjusting nut 8 which are in threaded connection, the upper adjusting nut 6 is hinged with a plurality of first movable rods 71, and the lower adjusting nut 8 is hinged with a plurality of second movable rods 72; when the drill bit is used, the rotating rod 4 is rotated, the upper adjusting nut 6 and the lower adjusting nut 8 move relatively or move back to back, the included angle between the corresponding first movable rod 71 and the corresponding second movable rod 72 on each adjusting rod 7 is driven to change, and the diameter changing function of the whole drill bit body is realized.
As shown in fig. 1 and 2, when a drilling operation is performed, an external driving force acts on the drill pipe 11 to directly drive the drill pipe 11 to rotate, but does not directly act on the rotating rod 4 to drive the rotating rod 4 to rotate, so that a locking assembly used in cooperation is arranged between the rotating rod 4 and the drill pipe 11 in order to ensure smooth performance of the drilling operation. Locking Assembly includes two external screw thread cover 1 and the internal thread cover of locking 2 that the cooperation was used, and two external screw thread cover 1 set up relatively and fixed with a brill section of thick bamboo 11, dwang 4 respectively, locking internal thread cover 2 and 1 threaded connection of external screw thread cover are used for locking two external screw thread cover 1. A fixed plate 3 is arranged in the drill barrel 11, a mounting hole which is sleeved with the rotating rod 4 and is arranged at a gap with the rotating rod 4 is arranged on the fixed plate 3, one external thread sleeve 1 is sleeved on the rotating rod 4 and is fixed with the fixed plate 3, the other external thread sleeve 1 is sleeved on the rotating rod 4 and is fixedly connected with the rotating rod 4, the locking internal thread sleeve 2 is sleeved on the two external thread sleeves 1 and is in threaded connection with the two external thread sleeves 1, as shown in figure 2, the locking internal thread sleeve 2 is rotated along the vertical direction, so that the locking internal thread sleeve 2 is separated from the external thread sleeve 1 fixed in the drill barrel 11, then the rotating rod 4 is rotated, the upper adjusting nut 6 and the lower adjusting nut 8 can move up and down to realize the diameter-changing operation of the drill bit body, then the threads on the two external thread sleeves 1 are opposite, the locking internal thread sleeve 2 is rotated down to the state in figure 1, and the rotating rod 4 and the drill barrel 11 can be locked, the plurality of adjusting rods 7 on the dwang 4 and the dwang 4 can be driven to rotate when the external driving force drives the drill barrel 11 to drill, and the drilling teeth on the adjusting rods 7 are used for drilling.
The adjusting mechanism and the locking assembly are simple in structure, the designed structure is simpler while related effects are achieved, and installation and replacement of parts are facilitated.
As shown in fig. 1 and 2, since the maximum included angle between the first movable rod 71 and the second movable rod 72 on each adjusting rod 7 is usually 180 ° or close to 180 ° in the prior art, and the prior art does not support the first movable rod 71 and the second movable rod 72 in this state, the first movable rod 71 and the second movable rod 72 in this state are very easily damaged during the drilling operation, and the service life of the reducing drill bit is reduced, in order to solve this problem, two adjusting claws 10 are fixed on the rotating rod 4, each adjusting claw 10 is used in cooperation with a plurality of first movable rods 71/second movable rods 72, when the maximum included angle between the first movable rod 71 and the second movable rod 72 is usually 180 ° or close to 180 °, the plurality of first movable rods 71/second movable rods 72 are arranged in contact with the corresponding adjusting claws 10, so that the adjusting claws 10 support the first movable rod 71 and the second movable rod 72 in this state, when the first movable rod 71 and the second movable rod 72 are subjected to drilling operation in the state, the drilling operation has small influence on the first movable rod 71 and the second movable rod 72, the hinge point of the first movable rod 71 and the second movable rod 72, which is caused by insufficient connection stress between the first movable rod 71 and the second movable rod 72, is not easily damaged in the drilling process, and meanwhile, the first movable rod 71 and the second movable rod 72 cannot be bent or broken during drilling in the state, so that the service life of the variable-diameter drill bit is prolonged.
As shown in fig. 1 and 2, in order to enable the adjusting claws 10 to stably support the first movable rod 71 and the second movable rod 72, the two adjusting claws 10 are located between the left-handed thread section and the right-handed thread section and fixed with the rotating rod 4; meanwhile, in order to increase the supporting effect of the adjusting claw 10, the structure of the adjusting claw 10 is designed in the present invention, as shown in fig. 3, the adjusting claw 10 includes a supporting plate 102 fixedly connected with the adjusting lever 7 and a clamping groove 101 disposed on the supporting plate 102 for clamping the movable lever. The supporting plate 102 is in a cone frustum shape, the supporting plate 102 is fixed with the mounting column 9 sleeved on the rotating rod 4, and the number of the clamping grooves 101 is matched with the number of the adjusting rods 7.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (5)
1. The utility model provides a drill bit of variable footpath, with bore a cooperation installation, this drill bit includes the drill bit body, the drill bit body includes at least one regulation pole, adjust the pole setting and lead to the inslot and including articulated two movable rods that set up in the installation of seting up on boring a section of thick bamboo, all be equipped with a plurality of drilling teeth on every movable rod, its characterized in that: the two movable rods are arranged at an included angle through the adjusting mechanism,
when the two movable rods are positioned at the maximum included angle, the two movable rods are respectively supported by two adjusting claws arranged on the drill bit body.
2. A variable diameter drill bit according to claim 1, wherein: the adjusting mechanism comprises a rotating rod which is sleeved in the drill cylinder and is rotationally connected with the drill cylinder,
the rotating rod is respectively provided with a left-handed thread section and a right-handed thread section along the length direction thereof, the left-handed thread section and the right-handed thread section are respectively provided with an upper adjusting nut and a lower adjusting nut which are in threaded connection, the upper adjusting nut is hinged with one of the movable rods, the lower adjusting nut is hinged with the other movable rod,
the two adjusting claws are positioned between the left-handed thread section and the right-handed thread section and are fixed with the rotating rod,
when the adjusting device is used, the rotating rod is rotated, the upper adjusting nut and the lower adjusting nut move relatively or move back to back, the included angle of the two movable rods is driven to change, and when the two movable rods are located at the maximum included angle, the two movable rods are respectively in contact with the two adjusting claws.
3. A variable diameter drill bit according to claim 2, wherein: the locking assembly that still is equipped with the cooperation and uses between dwang and the brill section of thick bamboo, locking assembly includes two external screw thread covers and the internal thread cover of locking that the cooperation was used, and two external screw thread covers set up relatively and fixed with a brill section of thick bamboo, dwang respectively, internal thread cover of locking and two external screw thread cover threaded connection are used for locking two external screw thread covers.
4. A variable diameter drill bit according to claim 3, wherein: the adjusting rods are arranged in a ring shape, each adjusting rod is respectively matched and installed with an installation through groove arranged on the drilling barrel, the two movable rods of each adjusting rod are respectively a first movable rod and a second movable rod,
the first movable rods are hinged with the upper adjusting nuts, the second movable rods are hinged with the lower adjusting threads,
the first movable rod/second movable rods are used with the same adjusting claw.
5. A variable diameter drill bit according to any one of claims 2 to 4, wherein: the adjusting claw comprises a supporting plate fixedly connected with the rotating rod and a clamping groove arranged on the supporting plate and used for clamping the movable rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121752368.5U CN215702966U (en) | 2021-07-30 | 2021-07-30 | Variable-diameter drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121752368.5U CN215702966U (en) | 2021-07-30 | 2021-07-30 | Variable-diameter drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215702966U true CN215702966U (en) | 2022-02-01 |
Family
ID=79990813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121752368.5U Active CN215702966U (en) | 2021-07-30 | 2021-07-30 | Variable-diameter drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215702966U (en) |
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2021
- 2021-07-30 CN CN202121752368.5U patent/CN215702966U/en active Active
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